Pump



SePt- 20, 1930 R. `w. BOYER 2,953,098

PUMP

Filed Sept. 9, 1957 2 Sheets-Sheet 1 {NVENTOR Sept. Z0, 1960 l R. w. BOYER PUMP 2 Sheets-Sheet 2 Filed Sept. 9, 1957 United States Patent O PUlVIP Raymond W. Boyer, Dayton, Ohio, assignor to Royal Electric, Inc., Xenia, Ohio, aV corporation of Ohio Filed sept. 9, 1951, ser. No. 682,762

1 claim. (C1. 10s- 161) This invention relates to a pump. 'This invention relates more particularly to a reversible delivery adjustable displacement pump. The invention also relates to a pump of the type disclosed by the Grey Patent 2,273,034 and is an improvement upon the structure of said patent. However, this application is not so limited due to the fact that this invention may be applied tok other mechanisms.

The aforesaid patent discloses a reversible delivery rotary pump which is provided with means for adjusting the rate of delivery of the pump. It is highly desirable to provide means by which the rate of delivery ofthe pump may be easily and readily adjusted as the. rate of rotation is held constant. It is also highly desirable that such adjustment be firmly mautained so that the adjusted rate of delivery does not change if a given rate of rotation of the pump is maintained. I

It is an object of this invention to provide a reversible delivery adjustable displacement pump having meansiby which the displacement is easily and readily adjusted during operation of the pump.

Another object of this invention is to provide such a pump apparatus, the rate of delivery of which is firmly maintained at any adjusted position.

Other objects and advantages reside in the construction of parts, the combination thereof, the method of manufacture, and the mode of operation, as will become more apparent from the following description.

In the drawings:

Figure 1 is a longitudinal sectional view of a` pump of this invention.

Figure 2 is a sectional view taken substantially on line 2-2of Figure 1.

Figure 3 is a sectional view taken substantially on line 3 3 of Figure l.

Figure 4 is a fragmentary sectional view taken substantially on line 4 4 of Figure 1.

Figure 5 is a fragmentary sectional View similar to that of Figure 4. Figure 5 shows the adjustable'pisto'n meinbers in a different position thereof from that shown in Figure 4.

Figure 6 is a sectional viewtaken' substantially on line 6--6 of Figure 1.

Figure 7 is a perspective exploded View showing elements of the pump of this invention.

Figure 8 is a perspective exploded view/showing other elements of the pump of this invention.

Figure 9 is a diagrammatic view'showingv the pump of this invention connected to a plurality of Vfluid motors for the operation thereof;

Referring to the drawings in detail, a pump of this invention includes a housing 16v provided with` a longitudinal bore or cavity 18 extending therethrough. The housing 16 is provided with anend plate 2Q at one end thereof and an end plate 22 at the other'end-th'ereof. The end plates 20 and 22 are attached to the housing 146ffby any suitable means such as by means of ai pluralityvof bolts or screws 24.

rrrice The end plates 20 and 22 extend upwardly at the ends of the housing 16 and are joined together at the upper ends: thereof by means of a plate 25. Cap' screws 26 extend through the plate 25 and into the end plates 20 and 22 for attachment therebetween. Cap screws 27 extend through the plate 25 into the housing 16 for attachment therebetween.

Each of the end plates 28 and 22 carries an antifriction bearing 30. The antifriction bearings 30l rotatably support a shaft 32. The shaft 32 extends slightly from the end plate 22 and is provided with a nut 36 and a washer 38 which retain the shaft 32 against axial movement. A cover plate 40 encloses the end of the shaft 32 and is attached to the end plate 22 by means of bolts 42.

A cover plate 44 is attached to the end plate 20 and is provided with an opening 46 through which the shaft 32 extends to any desired length for connection to-a suitable driving means.

The shaft 32 carries a rotor 48. The shaft 32 has-a square section 50 intermediate the bearings 30V to which is firmly attached a hub 52 of the rotor 48, as shown in Figure 1. The rotor 48 also includes wing members 58 which are attached to the hub 52 and extend outwardly therefrom at opposite portions thereof. The outer surface of each of the wing members 58 is arcuate, the arcuate surfaces of all of the wing members 58 having a common center at the center of the shaft 32. The Wings 58 with the hub 52 attached to the shaft 32 rotate within the bore 18 of the housing 16.. The bore 1.8'has arcuate surfaces 62 at oppositely disposed portions thereof. The center of the arc forming the arcuate surfaces 62 is at the center' of the shaft 32 and the radius of the arcuate surfaces 62 is' slightly greater than the radius from the center of the shaft 32 to the arcuate surfaces of the wings 58. Thus, as the rotor 48 revolves within the bore 18 there is very small distance between the arcuate surfaces of the wings 58 and the arcuate surfaces 62 of the cavity 18.

The bore 18 has oppositely disposed wall surfaces 64 which are spaced considerably farther from the center of the shaft 32 than the arcuate surfaces 62. The surL faces 64, as shown in Figure 2, are disposed somewhat normal to the arcuate surfaces 62 so that chambers 66 and -68 are formed at opposite portions of the rotor 48. The chamber 66 connects to a pair of huid conduits 70. The chamber 68 connects to a pair of fluid conduits 72. The conduits 70 and 72 extend to the exterior of the housing 16, as shown in Figure 2. Also, as shown in Figure 2, the housing may be provided with a conduit 73 joining the lower conduit 70. The conduit 73 may be used as a filler passage, if desired. Y

The rotor 48y carries a pair of pistons 80 which are attached one to the other by a link 82, as shown in Figure 8. The link 82 is provided with an elongate aperture 84 therein through which the shaft 32 extends, permitting the pistons to be disposed at opposite sides' of the shaft 32 and intermediate opposite wings 58 of the rotor 48. The rotor 48 also carries a pair of pistons 86, similar to the pistons 80. The pistons 86 are connected one to the other by means of a link 90. The link 90 has an elongate aperture therein, similar to the aperture 84, through which the shaft 32 extends. The pistons 86 are thus positioned in other slots of the rotor 48 and are substantially normal to the pistons 80', as shown inFig': ure 8.

Thus, the pistons 80 and 86 are carried by the rotor 48, each piston 80 or 86 being disposed between two of the wings 58l and slidably engageable therewith. Each piston 80 and 86 is thus reciprocally movable normal to the shaft 32. Y

Each ofthe end plates 2G and 22 is provided with a substantially circular recess 100 therein. In the exploded view of Figure 7 the end plate 20 is shown.v 'Ihe end plate 22 is similar thereto. Extending around most of the recess 100 is a iange 102 which extends outwardly from the end plate 20.

Joining the recess 100 and extending -radially therefrom is a channel 104. The channel 104 serves as a guide for a connector bar 106 which is slidably disposed therein. The connector bar 106 extends into the recess 100 and has a support cylinder 110 attached thereto and extending normally therefrom. The shaft 32 extends through each connector bar 106 and its respective support cylinder 110 which are disposed at each end of the rotor 48.

A guide plate 112 is disposed within the recess 100 of each of the end plates 20 and 22. VEach guide plate 112 has an'elongate aperture 114 through which the shaft 32 extends. Each guide plate 112 is provided with an elongate slot 116 within which its respective connector bar 106 slidably moves.V Each support cylinder 110 extends through the aperture 114 of its respective guide plate 112. Y

A bearing member 118 is carried by each support cylinder 110. The bearing members 118 are thus disposed at opposite ends of the rotor 48. The bearing members '118 are of such diameter that all ofthe pistons 80 and 86 slidably engage the bearings 118 for rotation therehousing'16. The screw 120 has an extension 130 at the Operation The shaft 32, extendingA from theV cover plate attached Vto any suitable means for rotation thereof. Rotation of the shaft 32 causes rotation of the rotor 48; The rotor 48 carries therewith the pistons 80 and`86. The

pistons 80 and 86 are journalled upon the bearing mem- YDue to the fact that the supportV cylinders 110 are reciprocally movable along a line normal to the axis of the shaft 32 by the connector bars 106, the support cylinders As shown in Figure 2, as a result of the eccentricity of the bearings 118 with respect to the shaft 32 the lower piston 80 may be disposed in close relationship to the lower arcuate surface 62 while-,the upper piston 80 is farther spaced from the upper arcuate surface 62.

When the pistons 80 or 86 are positioned horizontally, as shown in Figure 2, such pistons are at equal distances from the shaft 32. However, as the rotor 48 rotates one piston of each pair of the pistons 80 and 86 reciprocally moves closer to the shaft 32 while the otherY piston of the pair Vmoves awayfrom the shaft32,V the pistons being carried by the eccentrically disposed bearings 118. Thus, as the rotor 48 revolves, anygiven one of the pistons 80 or 86 moves farther into the'chamber 66 while its opposite piston 80 or 86 moves farther fromthe chamber 68.

In the description of the pumping operation of the ap- Y paratus of this invention, for purposes of illustration it will be assumed that fluid enters the chamber 66 through bothof the fluidconduits; 70, as' shown in-Figure 2. It will also be assumed that the rotor 48, as shown in Figure 2,-is rotating counterclockwise. Thus, as the piston 80, shown in the lowestgposition, moves within the cham- .ber 66, fluid withinthe chamber 66 enters the space intermediate the wings'58 within thechaniber 66, engaging the outer surface of thepiston disposed therebetween. As the rotor 48 continues to revolve the piston is moved to the uppermost position as shown in Figure 2. In this position the piston is closest to the shaft 32. In this position the uppermost piston has a considerable quantity of uid between the upper surface thereof and the surface 62 of .thebore 18.Y As the rotor 48 continuesV to revolve, the piston and the wings 58 in contact therewith move into the chamber 68. During this rotary movement of the rotor 48, a piston in the uppermost position moves to the left-hand position, as shown in Figure 2. During this movement of the piston from the uppermost position to the left-hand position, uid gathered from the chamber 66 is forced into Ythe chamber 68. Fluid is thus forced to ow outwardly from the chamber 68 through the conduits 72.

Thus, it is understood that as the rotor 48 revolves, the pistons 80 and 86 reciprocally move about the eccentrically located bearings 118. Each of the pistons 80 and 86, slidingly moving -between pairs Vof wings 58, gathers uid from the chamber 66 and discharges iiuid into the chamber 68. Y

It `is to be understood that the direction of the pumping action depends upon the direction of rotation of the rotor 48. 'Ihe direction of pumping action also dependsupon'the direction of eccentricity of Vthe bearings 118 with respect to the shaft 32. If the eccentricity of the bearings 118 is below the shaft'32, the direction of pumping action is such that fluid flows into the chamber V- 664 and'out of the chamber 68 when the rotor 48 is re- 110 and the bearings 118 may be moved to positions ec- Ymove reciprocally and along a line normal to the shaft v 32.V Thus, the eccentricity of the bearings 118 with respect to the'shaft 32 isa'djusted. The eccentricity of the bearings 118 with respect to the shaft 32 is either upwardly or downwardly with respect to the shaft 32 as the -support cylinders move upwardly or downwardly 'Y the elongate apertures 114 of the guide plates 112.

volving counterclockwise. YWith the sameV direction of rotation of therotor 48, the ydirection of fluid flow is reversed Vby changing the eccentricity of the bearings 118 to a position above the shaft 432.

It is further to be understood that the rate of ow or deliveryof 'thepump of this invention depends upon the degree or amount of eccentricity of the bearings 118 with respect'to the shaft 32. For example, in Figure 4 a large amount of eccentricity of the bearings 118 is shown compared to thef'eccentricity of the bearings`118 in Figure 5. Thus, the rate of delivery of the vpump with the eccentricity shown in vFigure 4 is considerably greater than ther-ate of delivery of the pump'with the eccentricity as shown in FigureV 5 for the same rate` of speed of the shaft 32.

' The adjustmentscrew`v 120,' shown inlFigures 1 and 2, is easily .andV readily adjusted by'any suitable means. The srew`120'ma`y ybeV adjusted while the pump is op- Y eratling.` lThus, theldirection Yand/orrrate of delivery is easily adjusted :during'pumpingoperation.V The adjusted position ofthe screw 120 is rmly retained in'any position thereof due to the fact that the adjustment screw 120 cannot be rotatively moved without engagement with the extension 130.

As shown in Figure 9, the pairs of conduits 70 and 72 of the housing 16 may communicate with conduits 150 which extend from the housing 16 to uid motors 152 and 154. Thus, a plurality of Huid motors may be operated simultaneously by a pump of this invention.

Due to the fact that the rate and direction of pumping action may be readily controlled by adjustment of the screw 120, the direction and rate of operation of all the uid motors connected to a pump of this invention may be controlled by adjustment of the screw 120.

Although the preferred embodiment of the device has been described, it will be understood that within the purview of this invention various changes may be made in the form, details, proportion and arrangement of parts, the combination thereof and mode of operation, which generally stated consist in a device capable of carrying out the objects set forth, as disclosed and defined in the appended claim.

Having thus described my invention, I claim:

A variable displacement lluid pump comprising a housing having a bore therethrough, a pair of end plates, there being an end plate at each end of the housing, a shaft extending through the bore of the housing and rotatably carried by the end plates, a rotor carried by the shaft Within the bore, each of the end plates having a recess therein facing the rotor, each end plate also having a channel therein facing the rotor and extending from the recess, a plurality of guide plates, there being a guide plate disposed within the recess of each end plate, each guide plate having a slot therein in alignment with the channel, a plurality of connector bars, there being a connector bar slidably movable within the slot of each guide plate and Within the channel of each end plate, each guide plate having an elongate aperture therein through which the shaft extends, a plurality of support cylinders, there being a support cylinder attached to each connector bar and encircling the shaft, each support cylinder having an inside diameter considerably larger than the diameter of the shaft extending therethrough, each support cylinder also extending through the elongate aperture of the guide plate and movable therewithin, each cylinder also being movable normal to the shaft, a plurality of bearings, there being a bearing carried by each support cylinder, a plurality of pairs of pistons slidably supported by the rotor and rotatably carried by the bearings, an adjustment screw carried by the housing and rotatable about an axis substantially normal to the shaft, a plurality of pins, there being a pin firmly attached to each connector bar and disposed in engagement with threads of the screw so that rotation of the screw causes movement of the connector bar along a line normal to the shaft and thus causes movement of the bearings along lines normal to the shaft, thus changing the eccentricity of the bearings with respect to the shaft.

References Cited in the le of this patent UNITED STATES PATENTS 1,492,266 Ray Apr. 29, 1924 1,818,611 Ernst Aug. 1l, 1931 1,977,033 Adams Oct. 16, 1934 2,273,034 Grey Feb. 17, 1942 2,399,990 Culver May 7, 1946 

